Tool-grinding machine



TOOL GRINDING MACHINE Filed May 22. 1922 6 q Jz I I i 22-1 I I I i'mvenfo, Slang/31s ##orney,

Patented Apr. 12, 1927.

v UNITED STATES SIMON LANGLAIS, OF MONTREAL, QUEBEC, CANADA.

roon earnnrne MACHINE.

Application filed May 22,

The object of the invention is to provide a simple and efficient machinefor grinding the cutting faces of tools particularly those used in theformation of tread surfaces of railway car wheels, the desired shape orformation of the cutting edge being exactly reproduced on one tool or ona number of tools.

For full comprehension however of my invention, reference must be had tothe accompanying drawings in which similar reference characters indicatethe same parts, and wherein:

Figure l is a plan view of my improved machine Figure 2 is a frontelevation thereof; and

Figure 3 is an end elevation.

Referring to the drawings a stationary base member of rectangular formis indicated at l and is provided with lugs 2 on its opposite ends bywhich it may be bolted to the supporting frame of the machine. The topof this base member has a longitudinal guideway 3 and a recess t at itsfront. This recess is disposed parallel to the guideway and is adaptedto receive a templet plate 5 the latter being secured in positiontherein by bolts 7 which engage notches 6 in the opposite ends of theplate. The front edge of this templet determines the shape of the edgeto be formed on the tool.

A carriage 8 is mounted upon the base and is slidable longitudinallywithin the guideway 3, the means for causing the longitudinal movementconsisting of a connecting rod 9 disposed parallel to the direction ofmovement of the carriage, and pivotally connected at one end to thelatter and at its opposite end as at 10 to amanually operable lever 11,the latter being fulcrmned upon a block 12 secured upon the supportingframe. The top of the longitudinally movable carriage is provided with atransverse guideway 13 in which is slidably mounted a transverselymovable second carriage 14. the latter having a forward projection 15from which is suspended a fixed downwardly extending shaft 16 rotatablycarrying a roller 17. The latter is maintained in yielding engagementwith the irregular face of the tamplet by springs 18 each of which isconnected at one end to the carriage 14: and at its opposite end to alug 19 carried bythe carriage 8.

The tool or tools to be ground are firmly 1922. Serial No. 582,764.

secured upon the carriage 14 by brackets 7 other flange extendingupwardly therefrom, v

the free end of each bracket having a slot 41 curved concentrically tothe pivot 40 and a bolt 42 passed through the slot and screwed into thetop of the carriage. The tool is clamped in position bearing against thevertical flange of the bracket and lying fiat upon the carriage by bolts43.

The grinding element is indicated at 22. Operation.

The operation of this machine is as fol lows A tool having been securedin position upon one of the brackets the grinding element is set inmotion and the carriage 8 moved longitudinally by lever 11. During thislongitudinaly movement the roller 17 is caused to follow the irregularface of the templet and the tool is consequently so moved relatively tothe grinding element that it will be ground to a shape correspondingwith that of the templet.

It is important that the cross section of the grinding face of the emerywheel, which is of semi-circular form, be of corresponding diameter withthe roller actuated by the templet, and it is also necessary that thetemplet be formed to coact properly with the particular diameter ofroller.

"What I claim is as follows 1. A grinding machine consisting of asupporting frame; a stationary base member fixed upon the supportingframe and having in its top a longitudinal guideway and a re cess, therecess being located at the front of the member; a templet mountedwithin said recess and disposed parallel to the guideway the front faceof the templet being irregular; a grinding element located adjacent therear side of the base member; a carriage sup ported upon the base memberand movable longitudinally within the guideway; said carriage having atransverse guideway in its top; a second carriage mounted upon the firstmentioned carriage and movable transversely in the transverse guideway,the said second carriage having a fixed downwardly extending shaft; aroller rotatably mounted upon said shaft and adapted to bear against theirregular face of the templet; means for yieldingly maintaining theroller in engage ment with the templet; means for moving the firstmentioned carriage longitudinally, and means mounted upon the secondcarriage for detachably securing a tool thereon; said last mentionedmeans consisting of a device, means rigidly securing the device to thetop of the carriage, and a clamping device for clam ing the tool incontact with the said rigid y mounted device.

2. A grinding machine consisting of a supporting frame; a stationarybase member fixed upon the supporting frame and having in its top alongitudinal guideway and a recess, the recess being located at thefront of the member; a tenlplet mounted within said recess and disposedparallel to the guideway, the front face of the templet being irregular;a grinding element located adjacent the rear side of the base member; acarriage supported upon the base member and movable longitudinallywithin the guide Way; said carriage having a transverse guideway in itstop; a second carriage mounted upon the first mentioned carriage andmovable transversely in the transverse guideway, the said secondcarriage having a fixed downwardly ext-ending shaft; a roller rotatablymounted upon said shaft and adapted to bear against the irregular faceof the templet; means for yieldingly maintaining the roller inengagement with the templet; means for moving the first mentionedcarriage longitudinally, and means mounted upon the second carriage fordetachably securing a tool thereon; said last mentioned means consistingof an angular bracket pivoted at one end upon the top of the trans versecarriage with one flange lying flat thereon and the other flangeextending upwardly therefrom; a slot in the free end of said bracket anda bolt extending through said slot and screwed into the top of thecarriage; and means for detachably clamping a tool in position bearingupon the top of the carriage and adjacent the vertical flange of thebracket.

Signed at Montreal, Quebec, Canada this 24th day of April, 1922.

SIMON LANGLAIS.

